Grin ding-mill



' (No Model.)

. R. C. PENFIELD.

GRINDING MILL.

Patented May 7, 1895.

'qwilcmmo UNITED STATES PATENT OFFICE.

RAYMOND O. PENFIELD, OF WILLOUGHBY, OHIO.

GRlNDlNG- -MILL.

SPECIFICATION forming part of Letters Patent No. 538,697, dated. May 7, 1895. Application-filed August 25, 1894. Serial 110.521,!554. (Ho model.)

To all whom it may concern.-

Be it known that I, RAYMOND O.PENFIEL1), a citizen of the United States, residing at Willoughby, in thecounty of Lake and State of Ohio, have invented a certain new, useful, and valuable Improvement in Grinding-Mills, of which the following is a full, clear, and exact description. 1

My present invention relates to grinding mills and particularly to that class of grinding mills which employ various forms of peculiarly shaped muller wheels.

Myinvention has for its object, first, to provide a muller wheel or a plurality of muller wheels the rim or periphery of each being of a fluted, serpentine or wave like form, or what I may term a staggered or drunken wheel so that when grinding it covers a space or path wider than the width of the rim; second, to provide a pan which revolves under the wheel or wheels; third, to provide an arrangement of the muller wheels upon the shaft carrying them, whereby each wheel works in apath of its own.

In order that my improvements may be fully understood, reference is invited to the accompanying drawings, in which- Figure 1 is a front elevation of my complete machine. Fig. 2 shows a form of my mullerwheel having four flutes. Fig. 3 shows a modified form of wheel having two flutes. Fig. 4 is an end view of a modified form of mullerwheel, the periphery of which is laterally waved or of serpentine form; and Fig. 5 is a plan view showing, approximately, a portion of the tracks of each of the four muller-wheels after they have made two revolutions'around the pan.

Proceeding to describe my invention in connection with the accompanying drawings, in which like characters of reference indicate the same parts throughout the several views, I would explain that the pulley wheels A give motion to the shaft A, which in turn revolves the vertical shaft B, through the medium of the beveled gears A B My preferable mode of operation is to rigidly secure the pan O to the bottom of shaft 13 at the point 0', the muller wheels D,'D D D being revolved by friction with the bottom of said pan or the material resting therein, the operation in this particular being similar material under the wheels.

to that ofa machine known to clay workers as a wet pan, but in a wet pan two broad rim wheels of an ordinary form are generally employed, one being located at either side of the pan, a scraper being used: to throw the A scraper will not run down close to the bottom of a pan and this, together with the fact that a Very broad wheel cannot thoroughly crush the material even with very heavy pressure, imperf ect work is often the result.

In my'form of muller wheel the rim D is comparatively narrow on its face, but owing to its fluted, corrugated, or wave like shape it covers a path at the bottom of the pan, after a number of revolutions, about three times the width of the face'of the rim, and the narrow rim cuts through and crushes the material coming under it more thorougly than a wide rim could do, but its peculiar shape has also a tendency to intermix the material by constantly throwing it from side to side.

. I generally prefer to employ four wheels and to arrange them upon the shaft as shown at Fig. 1, under which arrangement wheel D tracks between wheels D and D and wheel D tracks between wheels I) and D and so on. This arrangement causes the four wheels to cover the entire bottom of the pan and allows a sufficient space between each pair of wheels to prevent a clogging of the material.

My machine may be made to also operate in practically the same way as a chaser,

another form of machine in general use' among clay workers and in which the pan is stationary, the two wheels oppositely arranged being made to work in and out laterally so as to cover the entire surface of the pan, this lateral movement of the wheels requiring expensive mechanism, whereas the same purpos'efl'. e., covering the entire surface of the pan, is accomplished by simply employing my peculiarly shaped wheels.

In the foregoing specification and following claims I employ the words staggered or drunken to cover the shapes of rims shown and described, or any shape or shapes substantially the same.

1. In a grinding mill, the'combination with the frame thereof, of a bed-pan mounted in said frame, a staggered ordrunken mullerwheel located in the pan, and means for revolving said wheel, substantially as described.

2. In a grinding mill, the combination with the frame thereof, of a vertical shaft mounted in said frame a bed-pan connected to said shaft, 2. horizontal shaftjournaled in the frame above the pan, a staggered or drunken mullerwheel mounted on said horizontal shaft, and means for revolving said shafts, substantially as described.

3. In a grinding mill, the combination with the frame thereof, of a vertical and a horizontal shaft journaled in said frame, a bed-pan connected to the vertical shaft, two or more staggered or drunken mnller-wheels mounted on said horizontal shaft at varying distances from the center of the pan, and means for revolving said vertical shaft, substantially as described.

4. In a grinding mill, the combination with the frame thereof, of a vertical shaft journaled in said frame and carrying a bed-pan near its lower portion, a horizontal shaft journaled in the frame above the pan and carrying a plurality of staggered or drunken muller-wheels, two or more of which are arranged on each side of the vertical shaft, those on one side being opposite to those on the other side and means for communicating motion to the vertical shaft, substantially as described.

5. In a grinding mill, the combination with the frame thereof, of a bed-pan, a mullerwheel having a laterally waved or serpentine periphery and said wheel working in the pan in a serpentine path and means for revolving the muller wheel, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

RAYMOND C. lVitnesses:

L. W. PENFIELD, J. A. GoEEN.

PEN FIELD. 

